Rav Chaim Pinchas Scheinberg was asked if one should pray with a minyan on an airplane. He said yes, adding that he does it “all the time.” While strictly speaking it might be permitted to pray at your seat, Rav Scheinberg prefers that one pray with a minyan, but quietly in a way that doesn’t disturb others.
Rav Shmuel Halevi Wosner said “it is preferable to daven in small groups” on an airplane.